单项选择题
A.Create server baselines
B.Manage virtual machines
C.Monitor network traffic
D.Manage disk space
单项选择题 WhichofthefollowingshouldbedoneFIRSTbeforeinstallingNOSpatchesinaproduction environment？（）
单项选择题 Auserreportsthattheyareunabletoreachaparticularwebsite.Theuserhadnoissuesreaching thesiteearlierintheday.WhichofthefollowingistheMOSTlikelycauseofthelackofaccess？（）
单项选择题 Users report that they are unable to connect to a server. An administrator confirms that it is unreachable across the network. Other administrators have been working in the server room throughout the day. Which of the following is the NEXT step the administrator should take？（）